Grading-machine.



O. O. WOLD.

GRADING MACHINE. APPLIOATION FILED OOT. 12,1908.

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GRADING MACHINE.

APPLICATION FILED 001'. 12,1908.

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APPLICATION FILED OCT. 12,1908.

d/T/VTSJEj %W m CARL O -WOLD, OF MINNEAPOLIS, MINNESOTA.

GB AD ING-MACHINE Specification of Letters Patent.

Patented April 20, 1909.

Application filed October 12, 1908. Serial No. 457,296.

To all whom it mag concern:

Be it known that I, CARL O. WOLD, of Minneapolis, Hennepin county,Minnesota, have invented certain new and useful'Improvements inGrading-Machines, of which the following is a specification.

My invention relates to road graders and the object of the invention isto provide a machine of simple durable construction, one which iscapable of adjustment to suit the character of the soil in which thescraper blade is working and to permit tilting of the blade andadjusting at the desired angle with respect to the direction of movementof the machine.

Other obiects of the invention will appear from the following detaileddescription.

The invention consists generally in various constructions andcombinations all as hereinafter described, and particularly pointed outin the claims.

In the accompanying drawings forming part .of this specification, Figure1, is a plan view of a grading machine embodying my invention,illustrating the scraper blade adjusted at an an le to the direction ofmovement of the mac inc, Fig. 2, is a similar view illustrating theblade set at right angles to the direction of movement of the machine,Fig. 3, is a side elevation, Fig. 4, is a longitudinal verticalsectional view.

In the drawing, 2 re resents a forward axle having a pole 3 an wheels 4provided with flanges 5 which dig into the soil and hold the machineagainst skidding or lateral movement. A plate 6 is secured to the pole 3and has an upwardly turned rear end 7 that fits within a socket in adraw bar 8 and is held therein by a cotter in 9. The draw bar 8 iscomposed referab y of two channel bars secured toget er by bolts 10. Arec'- tangular frame is provided, composed preferably of a forwardchannel bar 11 a rear channel bar 12 and end bars 13 connectin them. Therear bar 12 has a central pivota connection with the draw bar 8 througha bolt 14. The forward channel bar has a series of holes 15 therein anda pin 16 is adapted to fit into one of said holes and into a slot 17provided in the draw bar 8: A plate 17 isprovided on the under side ofthe draw bar and has a series of holes to receive thelower end of the in16. Two bearing points are thus provi ed for this pin. This arrangementof the slot and pin, allows horizontal osclllation of the frame and itsadjustment with respect to the direction of travel of the machine. Anglebars 18 are secured to the end bars 13 and braces19 extend from these anle bars to bolts 20 which pass through the weIis of channel bars 21 andform the pivots therefor on the frame and particularly on the rear bar12 thereof.

The scraper 22 is rigidly secured to the angle bars 18 and braces 23extend from said scraper to the bar 12. Short independent crank axles 24are journaled in the bars 21 and are provided with carrying wheels 25similar to those on the front axle. Gear wheels 26 are mounted on theinner ends of the crank axles and are adapted to mesh with screws 27provided on the lower ends of posts 28 which are supported in theflanges provided on the bars 21 and have operating wheels 29. Byrevolving these screws, the crank shafts 24 will be oscillated and thebars 21 raised or lowered to lift or'depress the frame and tilt thescraper blade.

The bars 21 on opposite sides of the ma chine are held in parallelrelation with one another by means of a link 28 that is pivoted at itsends to said bars 21. A turn buckle device 29 connects one of the bars21 with the reach and enables the operator to set the rear wheels at aslight angle to the draw bar and the direction of travel. Thisadjustment is of particular advantage where the ground is dry and hardand where increased resistance to the tendency to lateral movement onthe part of the scraper blade is desirable. A seat 30 is provided on therear end of the reach where the wheels 29 can be easily operated.

Each crank axle 24 being independent of .the other crank axle, I am ableto raise or lower one side of the machine without disturbing theadjustment of the other side, and with the bars 21 arranged parallelwith the direction of movement or at an angle thereto.

I claim as my invention:-

1. In a grading machine, the combination with the draw bar, of a framepivoted thereon and capable of horizontal oscillation means for lockingsaid frame at an angle to the direction of movement of the machine and ascraper blade carried by said frame in front of the pivoted connectionof said frame and draw bar, substantially as described.

2. In a rading machine, the combination with'the raw bar, ofa'rectangular frame having channel bar sides and ends, the rear side barhaving a'pivotal connection on said draw bar and the forward rail ofsaid frame havin an adjustable connection with said draw bar and ascraper blade carried by said frame the pivot of said frame and said barbeing in the rear of said scra er.

3. In a grading machine, t e combination with the draw bar of a frameivoted thereon and provided with a series perforations, a pin adapted tofit into said perforations and into a longitudinal slot/provided in saiddraw bar and a scraper blade carried by said frame in front of thepivotal connection of said bar and said frame.

4. In a grading machine, the combination with the draw bar of a framemounted thereon, a scraper blade carried by said frame, bars pivoted onsaid frame and extending rearwardly therefrom crank axles havin carryingwheels journaled in said bars an means for oscillating said crank axlesto raise and lower said bars and frame.

5. In a grading machine, the combination with the draw bar, of a framepivoted thereon, a scraper blade carried by said frame, bars pivoted attheir forward ends, crank axles j ournaled in said bars and havingcarrying wheels, means for oscillating said crank axles, meansconnecting said bars with one another to hold them in parallel relation.

6. In a grading machine, the combination with the draw bar, of a framepivoted thereon, a scraper blade carried by said frame, pivoted barsprojecting rearwardly from'said frame, crank axles j ournaled in saidbars and having carrying wheels, means for raising and lowering saidaxles, meanacbnnectiog said bars with one another, said bars beingnormally in line with the direction of travel of the machine, and meansfor adjusting said bars at an angle to the direction of movement of themachine.

7. In a grading machine, the combination with a sore or frame and ablade carried thereby, of ars projecting rearwardly from said frame,crank axles journaled in said bars and having carrying wheels and postsgeared to said crank axles and havin an operating means, substantiallyas descri ed.

8. In a grading machine, the combination with a frame, and a scraperblade carried thereby, of bars pivotally connected with said frame andextendin rearwardly therefrom, crank axles humaid in said bars andhaving carrying w eels and means for oscillating said crank axlesindependently of one another, substantially as described.

.9. In a rading machine, a frame and a scraper bla e carried thereby incombination with pivoted bars and crank axles jou'rnaled therein,carrying wheels for said crank axles, means connecting said bars withone another to insure their simultaneous lateral oscillation and meansfor oscillating said crank axles.

10. In a grading machine, a frame, a scraper blade carried thereby,pivoted bars, crank axles ournaled in said bars and having carryingwheels, means for oscillatin sai crank axles and a link connecting saidbars with one another and holding them in parallel relation.

11. In a grading machine, the combination with forward and rear axlesand carrying wheels therefor, of a draw bar, a frame arranged tooscillate horizontally on said draw bar and a scraper blade carried bysaid frame and arranged to oscillate therewith the pivot of said frameand draw bar being in the rear of said scraper.

12. In a grading machine, the combination, with a .draw bar, of a frameivoted thereon and capable of horizontal osc1 lation, a scraper bladecarried by said frame, said frame having a pivotal connection with saidbar the rear of said blade, and a sliding connection therewith inadvance of said blade.

13. In a grading machine, the combination, with a draw bar, of a frameivoted thereon and capable of horizontal osci lation, a scraper bladecarried by said frame, said frame having a pivotal connection with saidbar in the rear of said scraper blade, and a sliding adjustableconnection with. said bar in front of said blade.

In witness whereof, I have hereunto set my hand this 5th day of October1908.

CARL O. WOLD. Witnesses:

RICHARD PAUL, J. A.BY1NGT01 I.

